Some artworks may be designed to have a temporary life span. At the end of this agreed life span the artwork should be decommissioned in line with the decommissioning plan, which should be developed at the outset of the project. In some instances it may be appropriate to extend the life of the artwork or move and install it in a different context.
When approaching this you should consider -
Is the artwork in good condition, does it need any repair or maintenance?
Have you consulted with the artist about your plans and are they in agreement to extend the life of the work? Do you have the budget to pay them for any time associated with repairing, moving or recontextualising the work. Also remember the artists and commissioners rights over the work (see Copyright and intellectual property/ownership of work regarding copyright and ownership of the work)
Was the artwork created for a specific context or site? Would it make sense if it was located at another site?
Remember that there is nothing wrong with an artwork having a temporary lifespan - temporary projects can surprise and delight, creating a powerful impact on audiences living on in their memory. Make sure temporary projects are well documented and shared to ensure legacy. Temporary projects can also play an important role in testing out ideas which may form the basis for more permanent commissions.